在 python 中的非抢先优先级调度中具有相同优先级输入的问题

问题描述 投票:0回答:0

当输入优先级是唯一的时,我的代码运行成功,但是当我们输入相同的优先级时,输出就会变得混乱。

因为我正在使用列表实施并使用优先级进行检查和比较,但在相同优先级的情况下,我希望比较它们的到达时间或突发时间......

我应该怎么做...

我通过制作自定义排序功能来接近,但它没有给出任何输出......


class Priority:
    
    """def custom_sort(ready_queue):
        temp1 = []
        temp2 = []
        myans = []
        ready_queuxe.sort(key=lambda x: x[3])
        for i in range(len(ready_queue)):
            for j in range(len(ready_queue)-i):
                if ((i+j+1)<len(ready_queue) and (ready_queue[i][3]==ready_queue[i+j+1][3]) ):
                    temp1.append(ready_queue[i:i+j+1])
                    temp2.append(ready_queue[:i])
                    temp1.sort(key=lambda x: x[2])
                    temp2.append(temp1)
                    myans.append(temp2)
                    j=j+1
                else:
                    break
        if(len(temp2)>0):
            return myans
        else:
            return ready_queue"""
        
        
    def processData(self, no_of_processes):
        process_data = []
        for i in range(no_of_processes):
            temporary = []
            process_id = int(input("Enter Process ID: "))
            burst_time = int(input(f"Enter Burst Time for Process {process_id}: "))
            priority_id = int(input(f"Enter Priority for Process {process_id}: "))
            arrival_time = int(input(f"Enter Arrival Time for Process {process_id}: "))
            temporary.extend([process_id, arrival_time, burst_time, priority_id,0])
            process_data.append(temporary)
        Priority.schedulingProcess(self, process_data)

    def schedulingProcess(self, process_data):
        start_time = []
        exit_time = []
        s_time = 0
        
        process_data.sort(key=lambda x: x[1])
        for i in range(len(process_data)):
            ready_queue = []
            temp = []
            normal_queue = []

            for j in range(len(process_data)):
                if (process_data[j][1] <= s_time) and (process_data[j][4] == 0):
                    temp.extend([process_data[j][0], process_data[j][1], process_data[j][2], process_data[j][3]])
                    ready_queue.append(temp)
                    temp = []
                elif process_data[j][4] == 0:
                    temp.extend([process_data[j][0], process_data[j][1], process_data[j][2], process_data[j][3]])
                    normal_queue.append(temp)
                    temp = []

            if len(ready_queue) != 0:
                """ready_queue = Priority.custom_sort(ready_queue)"""
                ready_queue.sort(key=lambda x: x[3])

                start_time.append(s_time)
                s_time = s_time + ready_queue[0][2]
                e_time = s_time
                exit_time.append(e_time)
                for k in range(len(process_data)):
                    if process_data[k][0] == ready_queue[0][0]:
                        break
                process_data[k][4] = 1
                process_data[k].append(e_time)

            elif len(ready_queue) == 0:
                if s_time < normal_queue[0][1]:
                    s_time = normal_queue[0][1]
                start_time.append(s_time)
                s_time = s_time + normal_queue[0][2]
                e_time = s_time
                exit_time.append(e_time)
                for k in range(len(process_data)):
                    if process_data[k][0] == normal_queue[0][0]:
                        break
                process_data[k][4] = 1
                process_data[k].append(e_time)

        t_time = Priority.calculateTurnaroundTime(self, process_data)
        w_time = Priority.calculateWaitingTime(self, process_data)
        Priority.printData(self, process_data, t_time, w_time)


    def calculateTurnaroundTime(self, process_data):
        total_turnaround_time = 0
        for i in range(len(process_data)):
            turnaround_time = process_data[i][5] - process_data[i][1]
            total_turnaround_time = total_turnaround_time + turnaround_time
            process_data[i].append(turnaround_time)
        average_turnaround_time = total_turnaround_time / len(process_data)

        return average_turnaround_time


    def calculateWaitingTime(self, process_data):
        total_waiting_time = 0
        for i in range(len(process_data)):
            waiting_time = process_data[i][5] - process_data[i][1] - process_data[i][2]

            total_waiting_time = total_waiting_time + waiting_time
            process_data[i].append(waiting_time)
        average_waiting_time = total_waiting_time / len(process_data)

        return average_waiting_time


    def printData(self, process_data, average_turnaround_time, average_waiting_time):
        process_data.sort(key=lambda x: x[0])

        print("P_ID    Arrival_Time    Burst_Time     Priority    Completed      Completion_Time    Turnaround_Time    Waiting ")

        for i in range(len(process_data)):
            for j in range(len(process_data[i])):

                print(process_data[i][j], end="              ")
            print()

        print(f'Average Turnaround Time: {average_turnaround_time}')

        print(f'Average Waiting Time: {average_waiting_time}')


if __name__ == "__main__":
    no_of_processes = int(input("Enter number of processes: "))
    prit = Priority()
    prit.processData(no_of_processes)


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